Use gradle version catalogs

.gitea/workflows/workflow.yaml

@@ -0,0 +1,72 @@
+name: Tests
+on: [push]
+jobs:
+  reset-status:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Reset test status
+        run: |
+          curl -v -X POST https://barrelsofdata.com/api/v1/git/action/status/publish \
+          -H 'X-API-KEY: ${{ secrets.STATUS_PUBLISH_API_KEY }}' \
+          -H 'Content-Type: application/json' \
+          -d '{"action":"${{ gitea.repository }}/action/tests","status":"starting"}'
+      - name: Reset build status
+        run: |
+          curl -v -X POST https://barrelsofdata.com/api/v1/git/action/status/publish \
+          -H 'X-API-KEY: ${{ secrets.STATUS_PUBLISH_API_KEY }}' \
+          -H 'Content-Type: application/json' \
+          -d '{"action":"${{ gitea.repository }}/action/build","status":"waiting for test"}'
+  tests:
+    needs: reset-status
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set test running
+        run: |
+          curl -v -X POST https://barrelsofdata.com/api/v1/git/action/status/publish \
+          -H 'X-API-KEY: ${{ secrets.STATUS_PUBLISH_API_KEY }}' \
+          -H 'Content-Type: application/json' \
+          -d '{"action":"${{ gitea.repository }}/action/tests","status":"running"}'
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up java
+        uses: actions/setup-java@v3
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+      - name: Run tests
+        id: tests
+        run: ./gradlew test
+      - name: Publish test status
+        if: always()
+        run: |
+          curl -v -X POST https://barrelsofdata.com/api/v1/git/action/status/publish \
+          -H 'X-API-KEY: ${{ secrets.STATUS_PUBLISH_API_KEY }}' \
+          -H 'Content-Type: application/json' \
+          -d '{"action":"${{ gitea.repository }}/action/tests","status":"${{ steps.tests.conclusion }}"}'
+  build:
+    needs: tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set build running
+        run: |
+          curl -v -X POST https://barrelsofdata.com/api/v1/git/action/status/publish \
+          -H 'X-API-KEY: ${{ secrets.STATUS_PUBLISH_API_KEY }}' \
+          -H 'Content-Type: application/json' \
+          -d '{"action":"${{ gitea.repository }}/action/build","status":"running"}'
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up java
+        uses: actions/setup-java@v3
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+      - name: Build
+        id: build
+        run: ./gradlew build -x test
+      - name: Publish build status
+        if: always()
+        run: |
+          curl -v -X POST https://barrelsofdata.com/api/v1/git/action/status/publish \
+          -H 'X-API-KEY: ${{ secrets.STATUS_PUBLISH_API_KEY }}' \
+          -H 'Content-Type: application/json' \
+          -d '{"action":"${{ gitea.repository }}/action/build","status":"${{ steps.build.conclusion }}"}'

.gitignore

@@ -1,7 +1,7 @@
 # Compiled classes
 *.class
 # Gradle files
-.gralde
+.gradle
 # IntelliJ IDEA files
 .idea
 # Build files

README.md

@@ -1,5 +1,8 @@
+[![Tests](https://barrelsofdata.com/api/v1/git/action/status/fetch/barrelsofdata/spark-structured-streaming-wordcount/tests)](https://git.barrelsofdata.com/barrelsofdata/spark-structured-streaming-wordcount/actions?workflow=workflow.yaml)
+[![Build](https://barrelsofdata.com/api/v1/git/action/status/fetch/barrelsofdata/spark-structured-streaming-wordcount/build)](https://git.barrelsofdata.com/barrelsofdata/spark-structured-streaming-wordcount/actions?workflow=workflow.yaml)
+
 # Spark Structured Streaming Word Count
-This is a project detailing how to write a streaming word count program in Apache Spark using Structured Streaming. The related blog post can be found at [https://www.barrelsofdata.com/spark-structured-streaming-word-count](https://www.barrelsofdata.com/spark-structured-streaming-word-count)
+This is a project detailing how to write a streaming word count program in Apache Spark using Structured Streaming. The related blog post can be found at [https://barrelsofdata.com/spark-structured-streaming-word-count](https://barrelsofdata.com/spark-structured-streaming-word-count)
 
 ## Build instructions
 From the root of the project execute the below commands
@@ -13,23 +16,19 @@ From the root of the project execute the below commands
 ```
 - To build jar
 ```shell script
-./gradlew shadowJar
+./gradlew build
-```
-- All combined
-```shell script
-./gradlew clean test shadowJar
 ```
 
 ## Run
-Ensure your local hadoop cluster is running ([hadoop cluster tutorial](https://www.barrelsofdata.com/apache-hadoop-pseudo-distributed-mode)) and start two kafka brokers ([kafka tutorial](https://www.barrelsofdata.com/apache-kafka-setup)).
+Ensure your local hadoop cluster is running ([hadoop cluster tutorial](https://barrelsofdata.com/apache-hadoop-pseudo-distributed-mode)) and start two kafka brokers ([kafka tutorial](https://barrelsofdata.com/apache-kafka-setup)).
 - Create kafka topic
 ```shell script
 kafka-topics.sh --create --bootstrap-server localhost:9092 --replication-factor 2 --partitions 2 --topic streaming-data
 ```
 - Start streaming job
 ```shell script
-spark-submit --master yarn --deploy-mode cluster build/libs/spark-structured-streaming-wordcount-1.0.jar <KAFKA_BROKER> <KAFKA_TOPIC>
+spark-submit --master yarn --deploy-mode cluster build/libs/spark-structured-streaming-wordcount-1.0.0.jar <KAFKA_BROKER> <KAFKA_TOPIC>
-Example: spark-submit --master yarn --deploy-mode client build/libs/spark-structured-streaming-wordcount-1.0.jar localhost:9092 streaming-data
+Example: spark-submit --master yarn --deploy-mode client build/libs/spark-structured-streaming-wordcount-1.0.0.jar localhost:9092 streaming-data
 ```
 - You can feed simulated data to the kafka topic
 - Open new terminal and run the shell script located at src/test/resources/dataProducer.sh

build.gradle

@@ -1,46 +0,0 @@
-plugins {
-    id "scala"
-    id "com.github.johnrengelman.shadow" version "${shadowJarPluginVersion}"
-}
-
-group "${projectGroup}"
-version "${projectVersion}"
-
-repositories {
-    mavenCentral()
-}
-
-dependencies {
-    compileOnly group: "org.scala-lang", name:"scala-library", version: "${scalaMajorVersion}.${scalaMinorVersion}"
-
-    compileOnly group: "org.apache.spark", name: "spark-core_${scalaMajorVersion}", version: "${apacheSparkVersion}"
-    compileOnly group: "org.apache.spark", name: "spark-sql_${scalaMajorVersion}", version: "${apacheSparkVersion}"
-    implementation group: "org.apache.spark", name: "spark-sql-kafka-0-10_${scalaMajorVersion}", version: "${apacheSparkVersion}"
-    
-    testImplementation group: "org.scalatest", name: "scalatest_${scalaMajorVersion}", version: "${scalaTestVersion}"
-}
-
-configurations {
-    testImplementation.extendsFrom compileOnly
-}
-
-task scalaTest(dependsOn: ['testClasses'], type: JavaExec) {
-    main = 'org.scalatest.tools.Runner'
-    args = ['-R', 'build/classes/scala/test', '-o']
-    classpath = sourceSets.test.runtimeClasspath
-}
-
-test.dependsOn scalaTest
-
-shadowJar {
-    mergeServiceFiles()
-    zip64 true
-    manifest {
-        attributes "Main-Class": "${mainClass}"
-    }
-    archiveFileName.set("${getArchiveBaseName().get()}-${projectVersion}.${getArchiveExtension().get()}")
-}
-
-clean.doFirst {
-    delete "logs/"
-}

build.gradle.kts

@@ -0,0 +1,56 @@
+plugins {
+    scala
+}
+
+project.group = "com.barrelsofdata"
+project.version = "1.0.0"
+
+dependencies {
+    compileOnly(libs.scala.library)
+    compileOnly(libs.bundles.spark)
+	
+	implementation(libs.spark.sql.kafka)
+    
+    testImplementation(libs.scala.test)
+}
+
+// https://docs.gradle.org/current/userguide/performance.html
+tasks.withType<Test>().configureEach {
+    maxParallelForks = (Runtime.getRuntime().availableProcessors() / 2).coerceAtLeast(1)
+}
+
+configurations {
+    implementation {
+        resolutionStrategy.failOnVersionConflict()
+    }
+    testImplementation {
+        extendsFrom(configurations.compileOnly.get())
+    }
+}
+
+tasks.register<JavaExec>("scalaTest") {
+    dependsOn("testClasses")
+    mainClass = "org.scalatest.tools.Runner"
+    args = listOf("-R", "build/classes/scala/test", "-o")
+	jvmArgs = listOf("-Xms128m", "-Xmx512m", "-XX:MetaspaceSize=300m", "-ea", "--add-exports=java.base/sun.nio.ch=ALL-UNNAMED") // https://lists.apache.org/thread/p1yrwo126vjx5tht82cktgjbmm2xtpw9
+    classpath = sourceSets.test.get().runtimeClasspath
+}
+
+tasks.withType<Test> {
+    dependsOn(":scalaTest")
+}
+
+tasks.withType<Jar> {
+    manifest {
+        attributes["Main-Class"] = "com.barrelsofdata.sparkexamples.Driver"
+    }
+	duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+    from (configurations.runtimeClasspath.get().map { if (it.isDirectory()) it else zipTree(it) })
+    archiveFileName.set("${archiveBaseName.get()}-${project.version}.${archiveExtension.get()}")
+}
+
+tasks.clean {
+    doFirst {
+        delete("logs/")
+    }
+}

gradle.properties

@@ -1,14 +1,7 @@
-scalaMajorVersion=2.12
+org.gradle.caching=true
-scalaMinorVersion=10
+org.gradle.configureondemand=true
-
-apacheSparkVersion=3.0.0
-
-scalaTestVersion=3.1.2
-
-shadowJarPluginVersion=6.0.0
-
-mainClass=com.barrelsofdata.sparkexamples.Driver
-projectGroup=com.barrelsofdata.sparkexamples
-projectVersion=1.0
-
 org.gradle.daemon=false
+org.gradle.jvmargs=-Xms256m -Xmx2048m -XX:MaxMetaspaceSize=512m -XX:+UseParallelGC -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+org.gradle.parallel=true
+org.gradle.warning.mode=all
+org.gradle.welcome=never

gradle/libs.versions.toml

@@ -0,0 +1,14 @@
+[versions]
+apache-spark = "3.5.0"
+scala = "2.13.8"
+scala-test = "3.2.17"
+
+[libraries]
+scala-library = { module = "org.scala-lang:scala-library", version.ref = "scala" }
+scala-test = { module = "org.scalatest:scalatest_2.13", version.ref = "scala-test" }
+spark-core = { module = "org.apache.spark:spark-core_2.13", version.ref = "apache-spark" }
+spark-sql = { module = "org.apache.spark:spark-sql_2.13", version.ref = "apache-spark" }
+spark-sql-kafka = { module = "org.apache.spark:spark-sql-kafka-0-10_2.13", version.ref = "apache-spark" }
+
+[bundles]
+spark = ["spark-core", "spark-sql"]

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -1,7 +1,7 @@
-#!/usr/bin/env sh
+#!/bin/sh
 
 #
-# Copyright 2015 the original author or authors.
+# Copyright © 2015-2021 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -17,67 +17,99 @@
 #
 
 ##############################################################################
-##
+#
-##  Gradle start up script for UN*X
+#   Gradle start up script for POSIX generated by Gradle.
-##
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
 ##############################################################################
 
 # Attempt to set APP_HOME
+
 # Resolve links: $0 may be a link
-PRG="$0"
+app_path=$0
-# Need this for relative symlinks.
+
-while [ -h "$PRG" ] ; do
+# Need this for daisy-chained symlinks.
-    ls=`ls -ld "$PRG"`
+while
-    link=`expr "$ls" : '.*-> \(.*\)$'`
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
-    if expr "$link" : '/.*' > /dev/null; then
+    [ -h "$app_path" ]
-        PRG="$link"
+do
-    else
+    ls=$( ls -ld "$app_path" )
-        PRG=`dirname "$PRG"`"/$link"
+    link=${ls#*' -> '}
-    fi
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
 done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
 
-APP_NAME="Gradle"
+# This is normally unused
-APP_BASE_NAME=`basename "$0"`
+# shellcheck disable=SC2034
-
+APP_BASE_NAME=${0##*/}
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
+MAX_FD=maximum
 
 warn () {
     echo "$*"
-}
+} >&2
 
 die () {
     echo
     echo "$*"
     echo
     exit 1
-}
+} >&2
 
 # OS specific support (must be 'true' or 'false').
 cygwin=false
 msys=false
 darwin=false
 nonstop=false
-case "`uname`" in
+case "$( uname )" in                #(
-  CYGWIN* )
+  CYGWIN* )         cygwin=true  ;; #(
-    cygwin=true
+  Darwin* )         darwin=true  ;; #(
-    ;;
+  MSYS* | MINGW* )  msys=true    ;; #(
-  Darwin* )
+  NONSTOP* )        nonstop=true ;;
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-  NONSTOP* )
-    nonstop=true
-    ;;
 esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
@@ -87,9 +119,9 @@ CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
         # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD="$JAVA_HOME/jre/sh/java"
+        JAVACMD=$JAVA_HOME/jre/sh/java
     else
-        JAVACMD="$JAVA_HOME/bin/java"
+        JAVACMD=$JAVA_HOME/bin/java
     fi
     if [ ! -x "$JAVACMD" ] ; then
         die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
@@ -98,88 +130,120 @@ Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
     fi
 else
-    JAVACMD="java"
+    JAVACMD=java
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
     fi
+fi
 
 # Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
-    MAX_FD_LIMIT=`ulimit -H -n`
+    case $MAX_FD in #(
-    if [ $? -eq 0 ] ; then
+      max*)
-        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
-            MAX_FD="$MAX_FD_LIMIT"
+        # shellcheck disable=SC2039,SC3045
-        fi
+        MAX_FD=$( ulimit -H -n ) ||
-        ulimit -n $MAX_FD
+            warn "Could not query maximum file descriptor limit"
-        if [ $? -ne 0 ] ; then
+    esac
-            warn "Could not set maximum file descriptor limit: $MAX_FD"
+    case $MAX_FD in  #(
-        fi
+      '' | soft) :;; #(
-    else
+      *)
-        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
-    fi
+        # shellcheck disable=SC2039,SC3045
-fi
+        ulimit -n "$MAX_FD" ||
-
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
-# For Darwin, add options to specify how the application appears in the dock
-if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
-fi
-
-# For Cygwin or MSYS, switch paths to Windows format before running java
-if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
-    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
-    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
-    
-    JAVACMD=`cygpath --unix "$JAVACMD"`
-
-    # We build the pattern for arguments to be converted via cygpath
-    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
-    SEP=""
-    for dir in $ROOTDIRSRAW ; do
-        ROOTDIRS="$ROOTDIRS$SEP$dir"
-        SEP="|"
-    done
-    OURCYGPATTERN="(^($ROOTDIRS))"
-    # Add a user-defined pattern to the cygpath arguments
-    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
-        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
-    fi
-    # Now convert the arguments - kludge to limit ourselves to /bin/sh
-    i=0
-    for arg in "$@" ; do
-        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
-        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
-
-        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
-            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
-        else
-            eval `echo args$i`="\"$arg\""
-        fi
-        i=`expr $i + 1`
-    done
-    case $i in
-        0) set -- ;;
-        1) set -- "$args0" ;;
-        2) set -- "$args0" "$args1" ;;
-        3) set -- "$args0" "$args1" "$args2" ;;
-        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
-# Escape application args
+# Collect all arguments for the java command, stacking in reverse order:
-save () {
+#   * args from the command line
-    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+#   * the main class name
-    echo " "
+#   * -classpath
-}
+#   * -D...appname settings
-APP_ARGS=`save "$@"`
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
 
-# Collect all arguments for the java command, following the shell quoting and substitution rules
+# For Cygwin or MSYS, switch paths to Windows format before running java
-eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
 
 exec "$JAVACMD" "$@"

gradlew.bat

@@ -26,6 +26,7 @@ if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
 if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
@@ -40,7 +41,7 @@ if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
+if %ERRORLEVEL% equ 0 goto execute
 
 echo.
 echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
@@ -54,7 +55,7 @@ goto fail
 set JAVA_HOME=%JAVA_HOME:"=%
 set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
-if exist "%JAVA_EXE%" goto init
+if exist "%JAVA_EXE%" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
@@ -64,21 +65,6 @@ echo location of your Java installation.
 
 goto fail
 
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
 :execute
 @rem Setup the command line
 
@@ -86,17 +72,19 @@ set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
 
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
 
 :end
 @rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
+if %ERRORLEVEL% equ 0 goto mainEnd
 
 :fail
 rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
 rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+set EXIT_CODE=%ERRORLEVEL%
-exit /b 1
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
 
 :mainEnd
 if "%OS%"=="Windows_NT" endlocal

settings.gradle

@@ -1 +0,0 @@
-rootProject.name = 'spark-structured-streaming-wordcount'

settings.gradle.kts

@@ -0,0 +1,14 @@
+pluginManagement {
+    repositories {
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+dependencyResolutionManagement {
+    repositories {
+        mavenCentral()
+    }
+}
+
+rootProject.name = "spark-structured-streaming-wordcount"

src/main/scala/com/barrelsofdata/sparkexamples/Driver.scala

@@ -50,7 +50,7 @@ object Driver {
   def main(args: Array[String]): Unit = {
     if(args.length != 2) {
       println("Invalid usage")
-      println("Usage: spark-submit --master <local|yarn> spark-structured-streaming-wordcount-1.0.jar <kafka_broker> <kafka_topic>")
+      println("Usage: spark-submit --master <local|yarn> spark-structured-streaming-wordcount-1.0.0.jar <kafka_broker> <kafka_topic>")
       LOG.error(s"Invalid number of arguments, arguments given: [${args.mkString(",")}]")
       System.exit(1)
     }